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Marshall County, IA


Micropolitan Statistical Area: Marshalltown, IA
Designated Market Area: Des Moines-Ames, IA-MO
USDA County Type (2025): Manufacturing
American Communities Project County Type (2023): Rural Middle America

Places in Marshall County, IA     [Sort places by name]

 

Tracts in Marshall County, IA

   



Click here to view demographic data for Marshall County, IA

2024 population: 40,392   ( 292 from 2020)
Land area: 572.5 square miles
Population density: 70.6 persons per square mile

2024 Census data
White:26,056 64.51% 6.7%
Black:1,0322.55% 37.8%
Indian:1970.49% 42.8%
Asian:1,8954.69% 21.0%
2+ races:6511.61% 18.8%
Hispanic:10,56126.15% 15.2%
Total non-White:14,33635.49% 17.8%

2020-2024 ComponentsNumberRate
Births:2,037 12.7
Deaths:2,32514.5
Net Migration: -834-5.2
Net Immigration: 1,4048.8
Change in White population:-1,873 -4.7
Change in Non-White pop.:2,165 5.4



Historical Presidential Election Results for Marshall County, IA

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R +244 R +1,286 R + 8.0%
D -1,042
2024 vs. 2016 R +669 R +1,187 R + 6.9%
D -518
2020 vs. 2016 R +425 D +99 D + 1.0%
D +524
2024 vs. 2012 R +1,343 R +4,466 R + 25.3%
D -3,123
2016 vs. 2008 R +868 R +3,239 R + 18.4%
D -2,371
How to interpret this table


Click on the Year to view county-level data for that election.

YearTurnout WinnerRunner-Up OtherTotal Votes Diff
(St) 		Diff
(US) 		PSV
2024 58% Donald Trump (R) 9,815 56.8% Kamala Harris (D) 7,134 41.3% 321 [+] 1.9% 17,270 1 7 1.04%
2020 61% Donald Trump* (R) 9,571 52.8% Joe Biden (D) 8,176 45.1% 389 [+] 2.1% 18,136 0 6 1.07%
2016 60% Donald Trump (R) 9,146 50.9% Hillary Clinton (D) 7,652 42.6% 1,182 [+] 6.6% 17,980 0 5 1.15%
2012 63% Barack Obama* (D) 10,257 53.8% Mitt Romney (R) 8,472 44.4% 335 [+] 1.8% 19,064 -2 -3 1.20%
2008 62% Barack Obama (D) 10,023 53.7% John McCain (R) 8,278 44.4% 362 [+] 1.9% 18,663 0 -1 1.21%
2004 64% George W. Bush* (R) 9,557 49.9% John Kerry (D) 9,443 49.3% 164 [+] 0.9% 19,164 0 -1 1.27%
2000 60% George W. Bush (R) 8,785 49.8% Albert Gore, Jr. (D) 8,322 47.2% 517 [+] 2.9% 17,624 2 2 1.34%
1996 60% Bill Clinton* (D) 8,669 50.0% Robert Dole (R) 7,017 40.5% 1,638 [+] 9.5% 17,324 1 0 1.40%
1992 63% Bill Clinton (D) 8,303 45.4% George Bush* (R) 6,784 37.1% 3,202 [+] 17.5% 18,289 0 0 1.35%
1988 61% Michael Dukakis (D) 9,760 55.6% George Bush (R) 7,657 43.6% 132 [+] 0.8% 17,549 -1 -10 1.43%
1984 67% Ronald Reagan* (R) 10,839 54.6% Walter Mondale (D) 8,809 44.4% 192 1.0% 19,840 1 -4 1.50%
1980 66% Ronald Reagan (R) 10,707 54.6% Jimmy Carter* (D) 7,114 36.2% 1,805 [+] 9.2% 19,626 3 4 1.49%
1976 67% Gerald Ford* (R) 9,562 51.3% Jimmy Carter (D) 8,695 46.7% 373 [+] 2.0% 18,630 2 3 1.46%
1972 64% Richard Nixon* (R) 10,798 60.9% George McGovern (D) 6,618 37.3% 328 [+] 1.8% 17,744 3 0 1.45%
1968 68% Richard Nixon (R) 9,402 56.3% Hubert Humphrey (D) 6,362 38.1% 922 [+] 5.5% 16,686 3 13 1.43%
1964 68% Lyndon Johnson* (D) 9,815 60.7% Barry Goldwater (R) 6,323 39.1% 38 0.2% 16,176 1 1 1.37%
1960 74% Richard Nixon (R) 10,265 60.2% John Kennedy (D) 6,761 39.7% 16 0.1% 17,042 4 11 1.34%
1956 69% Dwight Eisenhower* (R) 10,305 62.7% Adlai Stevenson (D) 5,755 35.0% 365 2.2% 16,425 4 5 1.33%
1952 73% Dwight Eisenhower (R) 11,135 65.9% Adlai Stevenson (D) 5,314 31.5% 441 2.6% 16,890 2 11 1.33%
1948 56% Thomas Dewey (R) 6,698 52.2% Harry Truman* (D) 5,602 43.7% 533 [+] 4.2% 12,833 5 7 1.24%
1944 58% Thomas Dewey (R) 7,325 55.7% Franklin Roosevelt* (D) 5,598 42.5% 234 1.8% 13,157 4 10 1.25%
1940 66% Wendell Willkie (R) 8,503 56.4% Franklin Roosevelt* (D) 6,497 43.1% 65 0.4% 15,065 4 12 1.24%
1936 66% Alf Landon (R) 7,377 52.7% Franklin Roosevelt* (D) 6,297 45.0% 334 [+] 2.4% 14,008 10 16 1.23%
1932 65% Herbert Hoover* (R) 6,604 49.0% Franklin Roosevelt (D) 6,385 47.4% 494 [+] 3.7% 13,483 9 9 1.30%
1928 64% Herbert Hoover (R) 9,326 73.4% Al Smith (D) 3,384 26.6% 0 0.0% 12,710 12 15 1.26%
1924 67% Calvin Coolidge (R) 9,010 68.7% Robert LaFollette (Prog) 2,584 19.7% 1,516 [+] 11.6% 13,110 14 15 1.34%
1920 61% Warren Harding (R) 9,334 79.1% James Cox (D) 2,166 18.4% 300 [+] 2.5% 11,800 8 19 1.32%
1916 38% Charles Evans Hughes (R) 4,172 60.3% Woodrow Wilson* (D) 2,414 34.9% 330 [+] 4.8% 6,916 6 14 1.34%
1912 38% Theodore Roosevelt (Prog) 3,106 46.2% Woodrow Wilson (D) 2,162 32.2% 1,449 [+] 21.6% 6,717 -11 -9 1.36%
1908 38% William Taft (R) 3,887 61.3% William J. Bryan (D) 1,941 30.6% 509 [+] 8.0% 6,337 6 10 1.28%
1904 38% Theodore Roosevelt (R) 4,229 66.7% Alton Parker (D) 1,203 19.0% 905 [+] 14.3% 6,337 3 10 1.30%
1900 46% William McKinley* (R) 4,878 65.1% William J. Bryan (D) 2,329 31.1% 289 [+] 3.9% 7,496 7 13 1.41%
* incumbent         PSV: percent of state vote

Historical Statewide Election Results for Marshall County, IA

Click on the Year to view county-level data for that election.

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 41% Charles Grassley* (R) 7,307 59.0% Michael Franken (D) 5,060 40.9% 16 [+] 0.1% 12,383 3 1.02%
2022 G 41% Kim Reynolds* (R) 7,544 60.9% Deidre DeJear (D) 4,584 37.0% 262 [+] 2.1% 12,390 3 1.01%
2020 S2 60% Joni Ernst* (R) 9,057 50.7% Theresa Greenfield (D) 8,187 45.8% 628 [+] 3.5% 17,872 -1 1.07%
2018 G 49% Kim Reynolds* (R) 7,243 49.4% Fred Hubbell (D) 7,095 48.4% 314 [+] 2.1% 14,652 -1 1.10%
2016 S3 59% Charles Grassley* (R) 10,432 58.8% Patty Judge (D) 6,585 37.1% 722 [+] 4.1% 17,739 -1 1.15%
2014 S2 45% Joni Ernst (R) 7,049 51.6% Bruce Braley (D) 6,041 44.2% 569 [+] 4.2% 13,659 0 1.21%
2014 G 45% Terry Branstad* (R) 7,202 52.5% Jack Hatch (D) 5,958 43.4% 558 [+] 4.1% 13,718 -6 1.21%
2010 S3 47% Charles Grassley* (R) 9,026 63.5% Roxanne Conlin (D) 4,836 34.0% 353 [+] 2.5% 14,215 -1 1.27%
2010 G 47% Terry Branstad (R) 7,116 49.8% Chet Culver* (D) 6,344 44.4% 843 [+] 5.9% 14,303 -3 1.27%
2008 S2 61% Tom Harkin* (D) 11,023 60.0% Christopher Reed (R) 7,327 39.9% 10 [+] 0.1% 18,360 3 1.22%
2006 G 46% Chet Culver (D) 7,322 53.5% Jim Nussle (R) 6,155 44.9% 221 [+] 1.6% 13,698 1 1.30%
2004 S3 64% Charles Grassley* (R) 13,343 70.6% Art Small (D) 5,259 27.8% 303 [+] 1.6% 18,905 0 1.28%
2002 S2 48% Tom Harkin* (D) 7,908 55.7% Greg Ganske (R) 6,047 42.6% 231 [+] 1.6% 14,186 -1 1.39%
2002 G 48% Tom Vilsack* (D) 7,624 53.6% Doug Gross (R) 6,256 44.0% 337 [+] 2.4% 14,217 -1 1.39%
1998 S3 48% Charles Grassley* (R) 9,679 69.1% David Osterberg (D) 4,203 30.0% 128 [+] 0.9% 14,010 1 1.48%
1998 G 48% Tom Vilsack (D) 7,436 52.9% Jim Ross Lightfoot (R) 6,489 46.1% 145 [+] 1.0% 14,070 0 1.47%
1996 S2 60% Tom Harkin* (D) 9,163 52.8% Jim Ross Lightfoot (R) 7,995 46.1% 201 [+] 1.2% 17,359 -1 1.42%
1994 G 53% Terry Branstad* (R) 8,010 52.5% Bonnie Campbell (D) 6,968 45.6% 288 [+] 1.9% 15,266 -4 1.53%
1992 S3 65% Charles Grassley* (R) 13,087 69.5% Jean Lloyd-Jones (D) 5,295 28.1% 436 [+] 2.3% 18,818 0 1.46%
1990 S2 52% Tom Harkin* (D) 8,628 58.2% Tom Tauke (R) 6,174 41.7% 11 [+] 0.1% 14,813 -4 1.51%
1990 G 52% Terry Branstad* (R) 8,154 55.0% Donald Avenson (D) 6,560 44.3% 110 [+] 0.7% 14,824 -6 1.52%
1986 S3 49% Charles Grassley* (R) 8,250 58.1% John Roehrick (D) 5,918 41.7% 22 [+] 0.2% 14,190 -8 1.59%
1986 G 49% Lowell Junkins (D) 7,866 55.1% Terry Branstad* (R) 6,412 44.9% 6 [+] 0.0% 14,284 -7 1.57%
1984 S2 66% Tom Harkin (D) 10,568 54.5% Roger Jepsen* (R) 8,603 44.3% 228 [+] 1.2% 19,399 1 1.50%
1982 G 54% Terry Branstad (R) 8,420 52.5% Roxanne Conlin (D) 7,507 46.8% 104 [+] 0.6% 16,031 0 1.54%
1980 S3 64% Charles Grassley (R) 11,560 60.1% John Culver* (D) 7,492 39.0% 182 [+] 0.9% 19,234 7 1.51%
1978 S2 46% Roger Jepsen (R) 7,414 57.6% Dick Clark* (D) 5,218 40.6% 231 [+] 1.8% 12,863 7 1.56%
1978 G 47% Robert Ray* (R) 7,887 59.7% Jerry Fitzgerald (D) 5,136 38.9% 183 [+] 1.4% 13,206 1 1.57%
1974 S3 45% David Stanley (R) 6,405 50.8% John Culver (D) 6,122 48.6% 75 [+] 0.6% 12,602 4 1.42%
1974 G 47% Robert Ray* (R) 8,396 63.7% James Schaben (D) 4,657 35.3% 126 [+] 1.0% 13,179 6 1.43%
1972 S2 63% Dick Clark (D) 9,628 54.9% Jack Miller* (R) 7,772 44.3% 140 [+] 0.8% 17,540 0 1.46%
1972 G 64% Robert Ray* (R) 10,157 57.5% Paul Franzenburg (D) 7,232 41.0% 271 [+] 1.5% 17,660 -1 1.46%
1970 G 42% Robert Ray* (R) 5,635 52.1% Robert Fulton (D) 4,775 44.1% 412 [+] 3.8% 10,822 1 1.37%
1968 S3 67% Harold Hughes (D) 8,422 51.4% David Stanley (R) 7,929 48.4% 20 [+] 0.1% 16,371 -1 1.43%
1968 G 67% Paul Franzenburg (D) 8,507 51.8% Robert Ray (R) 7,910 48.1% 19 [+] 0.1% 16,436 -6 1.45%
1966 S2 50% Jack Miller* (R) 7,581 63.6% E.B. Smith (D) 4,152 34.8% 186 [+] 1.6% 11,919 3 1.39%
1966 G 51% Harold Hughes* (D) 6,730 54.4% William Murray (R) 5,580 45.1% 65 [+] 0.5% 12,375 1 1.39%
1964 G 67% Harold Hughes* (D) 10,929 68.6% Evan Hultman (R) 4,832 30.3% 167 [+] 1.0% 15,928 -1 1.36%
1962 S3 43% Bourke Hickenlooper* (R) 5,966 59.3% E.B. Smith (D) 4,100 40.7% 0 0.0% 10,066 6 1.25%
1962 G 44% Norman Erbe* (R) 5,249 51.4% Harold Hughes (D) 4,959 48.6% 0 0.0% 10,208 4 1.25%
1960 S2 71% Jack Miller (R) 8,723 53.7% Herschel Loveless (D) 7,527 46.3% 0 0.0% 16,250 2 1.31%
1960 G 71% Norman Erbe (R) 8,761 54.0% Edward McManus (D) 7,449 46.0% 0 0.0% 16,210 2 1.31%
*: incumbent               +: ran on additional party lines               Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election           RO: runoff election           PSV: percent of state vote


Historical U.S. House Election Results for Marshall County, IA

Click on the District to view county-level data for that election (where available).

DateDistrictWinnerRunner-Up OtherTotal Votes
2024-11-05 IA04Randy Feenstra* (R) 9,629 59.1% Ryan Melton (D) 6,635 40.7% 26 0.2% 16,290
County Total for 2024-11-05:   16,290
2022-11-08 IA04Randy Feenstra* (R) 7,256 59.7% Ryan Melton (D) 4,633 38.1% 274 2.3% 12,163
County Total for 2022-11-08:   12,163
2020-11-03 IA01Ashley Hinson (R) 9,176 52.8% Abby Finkenauer* (D) 8,176 47.1% 21 0.1% 17,373
County Total for 2020-11-03:   17,373
2018-11-06 IA01Rod Blum* (R) 7,124 50.4% Abby Finkenauer (D) 6,611 46.7% 411 2.9% 14,146
County Total for 2018-11-06:   14,146
2016-11-08 IA01Rod Blum* (R) 9,587 55.8% Monica Vernon (D) 7,558 44.0% 25 0.1% 17,170
County Total for 2016-11-08:   17,170
2014-11-04 IA01Rod Blum (R) 7,203 53.9% Pat Murphy (D) 6,154 46.0% 7 0.1% 13,364
County Total for 2014-11-04:   13,364
2012-11-06 IA01Bruce Braley* (D) 9,480 52.3% Ben Lange (R) 8,168 45.1% 481 2.7% 18,129
County Total for 2012-11-06:   18,129
2010-11-02 IA04Tom Latham* (R) 8,935 63.1% Bill Maske (D) 4,864 34.3% 365 2.6% 14,164
County Total for 2010-11-02:   14,164
2008-11-04 IA04Tom Latham* (R) 10,196 55.8% Becky Greenwald (D) 8,055 44.1% 9 0.0% 18,260
County Total for 2008-11-04:   18,260
2006-11-07 IA04Tom Latham* (R) 7,427 55.0% Selden Spencer (D) 6,071 44.9% 12 0.1% 13,510
County Total for 2006-11-07:   13,510
2004-11-02 IA04Tom Latham* (R) 10,812 58.2% Paul Johnson (D) 7,747 41.7% 14 0.1% 18,573
County Total for 2004-11-02:   18,573
2002-11-05 IA04Tom Latham* (R) 7,236 51.4% John Norris (D) 6,563 46.6% 275 2.0% 14,074
County Total for 2002-11-05:   14,074
2000-11-07 IA03Leonard Boswell* (D) 10,379 60.3% Jay Marcus (R) 6,192 36.0% 644 3.7% 17,215
County Total for 2000-11-07:   17,215
1998-11-03 IA03Larry McKibben (R) 7,009 50.1% Leonard Boswell* (D) 6,770 48.4% 210 1.5% 13,989
County Total for 1998-11-03:   13,989
1996-11-05 IA03Mike Mahaffey (R) 8,923 52.6% Leonard Boswell (D) 7,640 45.0% 401 2.4% 16,964
County Total for 1996-11-05:   16,964
1994-11-08 IA03Jim Ross Lightfoot* (R) 8,354 55.3% Elaine Baxter (D) 6,543 43.3% 222 1.5% 15,119
County Total for 1994-11-08:   15,119
1992-11-03 IA03Elaine Baxter (D) 9,084 48.9% Jim Ross Lightfoot* (R) 8,576 46.1% 931 5.0% 18,591
County Total for 1992-11-03:   18,591
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Marshall County, IA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2024 17,597 7,135 40.5% 5,041 28.6% 5,421 30.8% Rep +2,094 Rep +11.9% 59%
2022 20,372 7,546 37.0% 6,660 32.7% 6,166 30.3% Rep +886 Rep +4.3% 68%
2020 23,541 7,902 33.6% 8,000 34.0% 7,639 32.4% Dem +98 Dem +0.4% 79%
2018 23,211 7,292 31.4% 7,168 30.9% 8,751 37.7% Rep +124 Rep +0.5% 77%
2016 23,924 7,657 32.0% 7,316 30.6% 8,951 37.4% Rep +341 Rep +1.4% 79%
2014 23,773 7,485 31.5% 7,133 30.0% 9,155 38.5% Rep +352 Rep +1.5% 79%
2012 24,854 7,920 31.9% 7,761 31.2% 9,173 36.9% Rep +159 Rep +0.6% 82%
2010 25,510 8,268 32.4% 8,008 31.4% 9,234 36.2% Rep +260 Rep +1.0% 84%
2008 26,700 8,146 30.5% 8,630 32.3% 9,924 37.2% Dem +484 Dem +1.8% 89%
2006 26,890 8,585 31.9% 8,131 30.2% 10,174 37.8% Rep +454 Rep +1.7% 90%
2004 27,222 9,271 34.1% 8,132 29.9% 9,819 36.1% Rep +1,139 Rep +4.2% 91%
2002 25,771 9,251 35.9% 7,494 29.1% 9,026 35.0% Rep +1,757 Rep +6.8% 87%
2000 25,249 9,576 37.9% 7,576 30.0% 8,097 32.1% Rep +2,000 Rep +7.9% 86%
1994 23,678 9,050 38.2% 8,144 34.4% 6,484 27.4% Rep +906 Rep +3.8% 82%
1986 24,550 9,146 37.3% 7,105 28.9% 8,299 33.8% Rep +2,041 Rep +8.3% 84%
VAPOP% is the estimated percentage of voting age population that is registered.
Registration data may include "inactive" voters.   Data for each year pertains to the November elections.